change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/include/net/ieee802154_netdev.h
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@@ -1,16 +1,8 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * An interface between IEEE802.15.4 device and rest of the kernel.
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  *
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  * Copyright (C) 2007-2012 Siemens AG
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2
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- * as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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  *
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  * Written by:
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  * Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
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@@ -22,6 +14,22 @@
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14
 
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 #ifndef IEEE802154_NETDEVICE_H
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 #define IEEE802154_NETDEVICE_H
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+
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+#define IEEE802154_REQUIRED_SIZE(struct_type, member) \
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+	(offsetof(typeof(struct_type), member) + \
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+	sizeof(((typeof(struct_type) *)(NULL))->member))
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+
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+#define IEEE802154_ADDR_OFFSET \
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+	offsetof(typeof(struct sockaddr_ieee802154), addr)
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+
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+#define IEEE802154_MIN_NAMELEN (IEEE802154_ADDR_OFFSET + \
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+	IEEE802154_REQUIRED_SIZE(struct ieee802154_addr_sa, addr_type))
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+
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+#define IEEE802154_NAMELEN_SHORT (IEEE802154_ADDR_OFFSET + \
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+	IEEE802154_REQUIRED_SIZE(struct ieee802154_addr_sa, short_addr))
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+
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+#define IEEE802154_NAMELEN_LONG (IEEE802154_ADDR_OFFSET + \
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+	IEEE802154_REQUIRED_SIZE(struct ieee802154_addr_sa, hwaddr))
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 #include <net/af_ieee802154.h>
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 #include <linux/netdevice.h>
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@@ -173,6 +181,33 @@
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 	memcpy(raw, &temp, IEEE802154_ADDR_LEN);
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 }
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+static inline int
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+ieee802154_sockaddr_check_size(struct sockaddr_ieee802154 *daddr, int len)
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+{
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+	struct ieee802154_addr_sa *sa;
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+	int ret = 0;
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+
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+	sa = &daddr->addr;
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+	if (len < IEEE802154_MIN_NAMELEN)
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+		return -EINVAL;
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+	switch (sa->addr_type) {
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+	case IEEE802154_ADDR_NONE:
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+		break;
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+	case IEEE802154_ADDR_SHORT:
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+		if (len < IEEE802154_NAMELEN_SHORT)
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+			ret = -EINVAL;
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+		break;
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+	case IEEE802154_ADDR_LONG:
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+		if (len < IEEE802154_NAMELEN_LONG)
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+			ret = -EINVAL;
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+		break;
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+	default:
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+		ret = -EINVAL;
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+		break;
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+	}
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+	return ret;
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+}
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+
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 static inline void ieee802154_addr_from_sa(struct ieee802154_addr *a,
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 					   const struct ieee802154_addr_sa *sa)
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 {